Instrument Errors Flashcards
(7 cards)
ASI errors
Position/pressure (AC configeration error)
Manouver Error
Density Error - only calibrated to read correctly at ISA MSL
VSI and IVSI errors
Instrument error - large mechanical movements needed from small sensed movements which polarises with altitude.
static blockage: pressue inside and out will equalise and read nothing.
Altimeter errors
Pressure errors: Outside Envelope, Position error, manouevre error.
Barometric error - wrong pressure setting.
Lag error - Slow response of aneroid and linkage
Hysteresis - lack of elastic properties of the aneroid.
Temperature probe errors
Position Error
instrument error
Environmental Error- solar heating// Ice accretion
Machmeter errors
Position Error
Instrument Error
Static and Pitot blockages
What is hysteresis error?
inelasticity in the aneroid capsule resulting in innacurate reading. Settles after time at an altitude.
What is the affect of activating the alternative static source?
The lower cabin pressure caused by aerodynamic suction causes the ASI and the ALT to partially overread.
VSI will indicated momentary climb.
